Please do the following steps: 1. Uninstall ATI Catalyst Control Center 2. Reboot the system 3. Uninstall Microsoft .net Framework 2.0 4. Reboot the system 5. Reinstall Microsoft .net Framework 2.0 from: http://www.microsoft.com/downloads/details.aspx?FamilyID=0856EACB-4362-4B0D-8EDD-AAB15C5E04F5&displaylang=en 6. Reboot the system 7. Reinstall ATI Catalyst Control Center 8. Reboot If procedures in above did not help, please try the following steps: 1. Uninstall all ATI drivers and software using "ATI - Software Uninstall Utility" in Control Panel / Add or Remove Programs 2. Reboot the system 3. Delete the folder "ATI Technologies" under C:\Program Files 4. Reinstall ATI Catalyst Software Suite or you may refer below URL link for details : http://support.ati.com/ics/support/default.asp?deptID=894&task=knowledge&questionID=26494